How was Abraham related to Sarah? (Genesis 20:12)

In this video, we will unpack how exactly was Sarah related to Abraham. The idea that they were half-brother & sister from the same father (cf Gen 20:12) appears to be a clear violation of the incest laws from Leviticus and Deuteronomy. Critics will attack this as a clear contradiction within Scripture; so having a coherent reason ready is necessary for the apologetic arena.
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